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Patent Searching and Data


Title:
PROCESS AND APPARATUS FOR UREA PRODUCTION
Document Type and Number:
WIPO Patent Application WO/2020/183717
Kind Code:
A1
Abstract:
In a urea synthesis process, temperature distribution in a submerged condenser is reduced. The process includes: synthesizing urea from NH3 and CO2 to generate a urea synthesis solution; by heating the solution, decomposing ammonium carbamate and separating a gaseous mixture containing NH3 and CO2 from the solution to obtain a solution higher in urea concentration than the solution obtained in the synthesizing; with use of a submerged condenser including a shell and tube heat exchange structure including a U-tube, absorbing and condensing at least a part of the gaseous mixture in an absorption medium on a shell side, and generating steam on a tube side with use of heat generated during the condensation; and recycling at least a part of liquid, obtained from the shell side, to the synthesizing, wherein water is supplied to the tube side of the condenser at a mass flow rate that is three times or more of the steam generation rate.

Inventors:
SASAKI KEIGO (JP)
Application Number:
PCT/JP2019/010610
Publication Date:
September 17, 2020
Filing Date:
March 14, 2019
Export Citation:
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Assignee:
TOYO ENGINEERING CORP (JP)
International Classes:
C07C273/04; B01J19/00
Domestic Patent References:
WO2013165246A12013-11-07
WO2006118071A12006-11-09
Foreign References:
EP1876171A12008-01-09
EP1728783A12006-12-06
JPH10182587A1998-07-07
EP0834501A21998-04-08
EP1035111A12000-09-13
EP1035112A12000-09-13
US5936122A1999-08-10
US6200540B12001-03-13
JP2003104949A2003-04-09
EP1279663A12003-01-29
US6518457B12003-02-11
EP1876171A12008-01-09
US20090062566A12009-03-05
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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